.pui-listbox {
    overflow:auto;
    padding:2px;
    width:125px;
}

.pui-listbox .pui-listbox-list {
    list-style-type: none; 
    margin: 0;
    padding: 0;
}

.pui-listbox .pui-listbox-item {
    margin:2px;
    border:0 none;
    cursor: pointer;
    font-weight: normal;
}